Gas-seal furnace.



P ATENTED JAN. 31, 1905.

S. lPHACOCKI GAS SEAL FURNACB.

. APPLIUATION FILED AUG. s. 1904.

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UNITED STATES Patented January s1, 1905.Vl

PATENT OFFICE.

SAMUEL PEAooeK, "or ioLA, KANSAS.

GAS-SEAL FURNACE.

SPECIFICATION forming part of `Letters Patent No. 781,546, dated January v31, 1905.

n Application filed August 8, 1904:. vSerial Io. 219,979.

To @ZZ whom t may concern:

Be it known that I, SAMUEL PEAoooK, a citi-- zen of the United States, residing at Iola` in the county of Allen and State of Kansas, have invented certain new and useful Improvements in Gas-Seal Furnaces; and I d o hereby declare the drawings as a rotary roasting-furnace adapted especially for the treatment of zinc With the objects stated in view myfinvention consists in the construction and combinations of parts, as hereinafter described and the ore itself shall be fed in such quantities as to practically keep the tube 5 full, thereby preventing the escape of "gases therefrom.

e represents the inclined shell of a revolving rotary furnace, although, assaid before,` my invention can be applied to any form of furnace. y

Af represents the-furnace'itself, andv it is separated froml the shell by anl annular passage, being supported insaid shell by any suitable means, suchfas blocks of fire-brick or any suitable material.

Preferably the shell e and furnace f are The ore lined with fire-brick, and the furnace j may be provided Ywith any desired stirring means,

l such as is afforded by having some of the fire- `briclrs which linethe same project above the others, for example.

rollers L and a driving-pinion el, which meshes through the iiue m into the-chimney.

. n represents a stationary part of the end structure into which the roasted ore is delivered, whereupon it falls down through the pipe r and is delivered by the screw conveyer into theinclined pipe t, and thenv afsecond screw conveyer u forces it up through an` 4other inclined pipe, this construction being used in order to form a tight seal to prevent air entering through the pipe r. In case Zinc ore is treated it is the ashes and wastethat pass out through the pipe r, .the zinc being reduced in the furnace f and volatilized and passing up through the pipe 0 and along Vthrough the pipe p, which is incased in the structure g to prevent too rapid cooling. The

volatilized zinc is led off and condensed in the usual way.

AIf desired, a gas seal similar to 4 that here- `inafter described may be applied to the dis-l charge-pipe 8; but usually this will not be necessary.

. Preferably each end of the furnace f is tapered, as shown at e inv Fig. 2', and enters a tapered stationary portion w, which is provided with a pipe y, which pipe delivers into an annular enlargement A pipe 2 delivers neutral gases-suchas nitrogen, carbonic-acid gas,ior carbonic oXid-into the annular space a: under pressure, and it escapes in both directions from said space, thereby effectually preventing any air from entering the furnace. The construction on the feed end of .the fur- IOO , 55 g represents a shaft provided with grooved 1 nace is substantially the same as that on the delivery end. The gases which pass through the pipes .e and l may be obtained in any suitable manner-as, for instance, they may be drawn off from the flue m or from around the pipe p in the casing g.

I represents connections between the space 2 and the space around the pipe p, so that the pipe p may always be kept hot.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the-United States, is-

1. The combination of a rotary furnace and means for rotating the same, with a gas seal for each end of said furnace, consisting of a stationary part arrangedin proximity to said furnace, and provided with a pipe and an annular channel located near the end of said furnace, whereby gas under pressure may be forced in both directions around the end of said furnace, substantially as described.

2. The combination of an inclined rotary furnace and means for rotating the same, said furnace being provided with tapered ends and a gas seal for each end of said furnace consisting of an inclined part arranged in proximity to said tapered ends, said inclined part being provided with an annular recess and a pipe connecting therewith, whereby gas under pressure may be forced out through said annular recess in both directions around the end of said furnace, substantially as described.

3. The combination of an inclined rotary furnace and means for rotating the same, a hopper and associated means for delivering ore to said furnace, and means for delivering the ashes or roasted ore away from said furnace, both of said feed and delivery means being arranged to prevent the entrance of air, stationary structures at the end of said furnace, means for heating said furnace, anda gas seal for each end of said furnace arranged in proximity to the tapered end thereof` said gas seal consisting of a stationary structure provided with an inclined end, said inclined end being provided with an annular recess and a pipe leading to said recess, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL PEACOCK. vWitnesses:

CHAs. H. GAYLORD, W. C. HARRINGTON. 

